Ribbon wiring



May l5, 1939-I G. P. scHwA'BAcHER 2,158,867

RIBBON WIRING Filed DeC. 26, 1935 Inventor: Gerhard F? Schwabacherj HisAttorheg.

Patented May/"16, 1939 UNITED STATES PATENT OFFICE llgnor to GeneralElec ration of New York Application December 26, 1935, Serial No. 58,214

1 Claim.

'I'he present invention relates to multiple conductor cables for use insurface extensions of wiring systems, and particularly to cables whichare adapted to be secured to baseboards, molding.

5 and the like.

The object of my invention is to provide an improved cable to this type,and for a consideration of what I believe to be novel and my invention,attention is directed to the following description and the claimappended thereto.

In the drawing, Fig. 1 is a fragmentary view showing a cable myinvention, attachedto abeboardandusedasa surfaceextension ofthe wiringsystem from an outlet;

Fig. 2 is a sectional view of the cable taken through one of the nailssecuring the cable to the baseboard; and Fig. 3 is a sectional view ofthe cable intermediate the nails.

Referring to the drawing, the cable comprises a flat strip I of exibleinsulating material such as rubber, adjacent each edge of which isembedded a flexible electric conductor 2, which may be made of braidedstrands. The conductors are relatively ilat so that they may be embeddedin a relatively thin strip of rubber. 'Ihe lower or surface contactingportion of the rubber strip is concave so that the edges will make goodcontact with the surface to which the cable is secured. 'I'he upper sideof the rubber strip is provided with two longimdxnn beads -z dennmg agroove I, which serves to locate the nails or other headed fasteningmeans I which secure the cable in place. The beads I project above thesurface of the rubber strip. When the cable is nailed in 5 place,theheadsoftbenailsengagethebeads Las shown in Fig. 2, and are therebyprevented from being embedded in the rubber between the conductors. Thisdecreases the likelihood of short circuiting the conductors through thenail heads. The likelihood of short circuiting the conductors is alsoprevented by the ilow of rubber from under the nail heads to the spacebetween the con- 5 ductors. It is apparent that with this construction,there will be a safe amount of rubber between the nail and theconductors. Also, due to the presence of the groove I on the upper side,of the cable, there is very little likelihood that l0 the securing nailswill be improperly located.

Fig. 1 shows an installation of the cable. The cable is connected at oneend to a plug 6 which is connected to an outlet 'l and is connected atthe other end to an electrical fixture, such as a rel ceptacle I. 'nieintermediate length oi' cable is nailed at suitable intervals to a baseboard l. It is obvious that other headed fastening means, such asscrews, could be used in place of the nails.

What I claim as new and desire to secure by o Letters Patent of theUnited States is:

A cable adapted to be secured to and to lie flat on a surface comprisinga flat substantially rectangular strip of flexible resilient Vinsulatingmaterm, conductors embedded in said strip, ssid- *5 conductors beingspaced apart suillciently to permit securing the cable to a surface byfastmers extending through the strip between the-conductors into thesurface and parallel beads formed ,o integrally with said resilientinsulating material and extending above the upper surface of therectangular strip between the conductors dening a groove therebetweenfor locating the fasteners and for preventing embedding of the fastenersu in the strip of insulating material.

GERHARD P. scHwA'BAclmn.

